Eventually, I settled on this orientation: the front brackets bolted to the web of the I-beam, and the rear shackles bolted thru the flanges - no rear brackets. This results in the spring being in almost the same position relative to the beam as it was to the van's structure, so the shocks should work perfectly, and bumpstops will be easy.

Owner caption October 2011 · Photo 1020 of 2259